LOS ANGELES (AP) — Beverly Hills police say they have concluded Whitney Houston's death investigation and found no signs that a crime occurred.

Lt. Mark Rosen said Wednesday the determination was made after reviewing the Grammy-winning singer's full autopsy report, which attributed her death to accidental drowning. Coroner's officials ruled heart disease and cocaine use contributed to the 48-year-old singer's death.

Houston died in a bathtub of the Beverly Hilton Hotel on Feb. 11 on the eve of the Grammy Awards. She had been planning a comeback, including a starring role in the remake of the film "Sparkle," which is due for release later this year.

Police have repeatedly said they have found no signs of foul play in Houston's death.